diff options
| author | Muchun Song <songmuchun@bytedance.com> | 2021-11-05 13:37:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-11-06 13:30:35 -0700 |
| commit | 41d17431df4aa7c57761e04f81c94fb3c3beedf4 (patch) | |
| tree | 5847dee7f7d5e734fbd7fb7c625c1100700707f6 /Kconfig | |
| parent | 60ec6a48eec24986a6414740a2481d22efc1b2f9 (diff) | |
mm: list_lru: fix the return value of list_lru_count_one()
Since commit 2788cf0c401c ("memcg: reparent list_lrus and free kmemcg_id
on css offline"), ->nr_items can be negative during memory cgroup
reparenting. In this case, list_lru_count_one() will return an unusual
and huge value, which can surprise users. At least for now it hasn't
affected any users. But it is better to let list_lru_count_ont()
returns zero when ->nr_items is negative.
Link: https://lkml.kernel.org/r/20211025124910.56433-1-songmuchun@bytedance.com
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Roman Gushchin <guro@fb.com>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Kconfig')
0 files changed, 0 insertions, 0 deletions